Baccatin derivatives and processes for preparing the same

摘要

Disclosed are 13 alpha -(3-substituted-2-hydroxypropionyloxy)baccatin compounds represented by the formula: <IMAGE> wherein R1 represents a lower alkanoyl group or a protective group for hydroxy group; R2 represents a protective group for hydroxy group; R3 represents a lower alkanoyl group; R4 represents a substituted or unsubstituted benzoyl group; X represents a substituted or unsubstituted aryl group, a substituted or unsubstituted lower alkenyl group, or a substituted or unsubstituted lower alkynyl group; and A' represents a halogen atom, azido group or amino group, and processes for preparing the same.